21100122211122 has 48 divisors (see below), whose sum is σ = 45762439282560. Its totient is φ = 7026375774816.

The previous prime is 21100122211097. The next prime is 21100122211139. The reversal of 21100122211122 is 22111222100112.

21100122211122 is a `hidden beast` number, since 211 + 0 + 0 + 122 + 211 + 122 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21100122211095 and 21100122211104.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88736233 + ... + 88973699.

It is an arithmetic number, because the mean of its divisors is an integer number (953384151720).

Almost surely, 2^{21100122211122} is an apocalyptic number.

21100122211122 is an abundant number, since it is smaller than the sum of its proper divisors (24662317071438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21100122211122 is a wasteful number, since it uses less digits than its factorization.

21100122211122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242367 (or 242364 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21100122211122 its reverse (22111222100112), we get a palindrome (43211344311234).

The spelling of 21100122211122 in words is "twenty-one trillion, one hundred billion, one hundred twenty-two million, two hundred eleven thousand, one hundred twenty-two".